Locator inheritance
Classes can be structured hierarchically. Locators and their properties are inherited from parent classes by their child classes.
The locator that is inherited from the parent class remains grayed out, and its name is written in italics. This indicates that the method is inherited and that the locator name cannot be changed. Only the names of locators that are not inherited can be changed.
You can overwrite an inherited locator in a child class by copying the inherited locator locally. You can then configure its properties or change the locator method altogether. A locator that is inherited and overwritten, is displayed in a dark color, and the name is also written in italics.
If you overwrite an inherited locator locally in a child class, make sure that the local locator has the same subfields as the locator in the parent class. Otherwise, an inherited assignment to a field might not be resolved. This can lead to an extraction error.
For example, there is an Advanced Zone Locator defined in a parent class that creates two subfields S_A and S_B. They are assigned to the fields F_A and F_B, respectively. The parent class has a child class that contains a locator that is locally overwritten with a format locator called “FormatLoc.” The format locator is assigned to Field F_B. If you extract a document that is classified as the child class, you see an error because Field F_A inherits a locator assignment (to S_B). But locally, the format locator no longer provides this subfield.